Pumping unit



s- 1 9 H. H. INGERSOLL 2,326,360

PUMPING UNIT Filed March 24, 1941 INVENTOR.

ATTORNEYS.

Patented Aug. 10, 1943 PUMPING UNIT Homer H. Ingersoll, Kalamazoo, Micln, assignor to Kalasign Company of America, Kalamazoo,

Mich.

Application March 24, 1941, Serial No. 384,781

3 Claims.

This invention relates to pumping units.

The mainobjects of my invention are:

First, to provide a motor driven pumping unit suitable for pumping liquids in which the unit is immersed.

Second, to provide a unit of the type described especially adapted for fountain purposes and the like, having novel provision for dissipating the heat evolved in the operation of the motor drive therefor.

Third, to provide a motor of novel construction which is particularly adaptable for use with a fountain pumping or like unit.

Fourth, to provide a novel and improved encased motor pumping unit.

Fifth, to provide an improved motor Which is characterized'by increased torque, quicker magnetization and demagnetization, a decreased flux lag, and which has less tendency to heat up than present motors, hence is Well adapted for the foregoing purposes.

Further objects relating to detail and economies of my invention will appear from the description to follow. The invention is defined in the claims.

A structure embodying the features of my invention is illustrated in the accompanying drawing, wherein:

Fig. 1 is a fragmentary view in elevation partially broken away and in section illustrating the pumping unit of my invention in operative rela tion to a reservoir or other container from which liquid is to be pumped and in which the unit is immersed.

Fig. 2 isan enlarged view in vertical section on line 2-2 of Figs. 3 and 4, illustrating structural details of the pump and encased motor drive therefor,

Figs. 3 and 4 are views in section on lines 33, 4-4 respectively of Fig. 2, further illustrating details of construction and parts of the unit.

This invention relates in general to a pumping unit adapted for the pumping of liquids for various purposes. Though originally devised as a pumping unit for fountains and th like, it will be apparent to those skilled in the art that its field of adaptation is not unduly limited. It is, on the contrary, well suited for the pumping of any type liquid from a reservoir in which the unit is partially or wholly immersed in the liquid. In particular, the present unit involves a novel and improved arrangement of a motor drive for a pumping impeller and a motor drive casing improvements in arrangement of the whereby to dissipate heat generated in the motor in its operation, Which heat would ordinarily be destructive Were provision not made to dissipate the same.

Referring to the drawing, the reference numeral I desi nates a suitable conventionally illusfountain or the like in which a quantity of old is contained, said liquid to be pumped by the pumping unit of my invention which is generally indicated by the reference numeral 3.

Referring to Fig. 2, wherein details of the construction are illustrated, the unit consists of a base casting l secured to a mounting and support plate 5 provided with rubber or other suitable feet 6 for supporting the unit in the reservoir. Casting 4 is cored out to provide a central vertical aperture 1 receiving a bearing 8 in which the pump impeller shaft 9 i rotatably mounted, the impeller ii attached to and driven by the shaft being disposed in a pumping chamber H, defined by a further cored-out recess in casting 4 above the bottom apertured inlet member into the pump chamber ii, the liquid being dis-- charged through a discharge fitting 53 tapped: into the base in communication with the chamberand adapted to receive a suitable hose or other liquid transmission line.

The shaft 9 is vertically sustained by the ad'- justable end thrust bearing member l4 engageable in a groove :5 in the shaft and carried by a sleeve-like support [6 tapped into the side of the base and shaft bearing.

A cylindrical copper shell or sheath ll, prefer ably though not necessarily closed at its upper end, is mounted on and secured to the base 4 in any suitable fashion to enclose the shaft and motor drive therefor, to be described, this shell or sheath being provided with a side aperture l3 permitting access to the adjustable thrust or sustaining member M. This shell of highly heat conductive material is in direct contact with the motor to serve to transmit heat therefrom to the liquid in which the unit is partially immersed to thereby assure cool operation of the motor. This arrangement makes it possible to use a very small motor and to load it to capacity Without danger of overheating and burning out of the motor.

The motor for driving the shaft 9, generally indicated by the reference numeral i9, is of the squirrel cage, shaded pole type having a rotor 20 rotatable on a vertical axis and driving shaft 9. It Will be noted that the motor departs sharply plate 5. This latter plate is: provided with a central opening receiving the.- IE for the entry of liquid.

'or fiange tt of the cast base.

through the co '3" r sheath i .tance v 2 aeaasco top of the unit and out of the liquid in which the unit is partially immersed without making the unit unduly large. The laminated iron field 22, including the poles 22E, is disposed on either side of the rotor, being bolted On lateral wings As illustrated in Figs. 1 and 2, field winding or cell '2! is Wound 'on the laminated field directly above the rotor 28. r

' will be particularly noted that the laminated 22 including both the poles ZEI andthe connesting legs thereof adjoining the coil has the laminae thereof disposed in planes normal to and transverse the axis of the rotor. This. so far as the legs 222 are concerned, is a 99;

changei'rom the usual construction and I have found that it results in quicker-magnetizing and Zing of the field, a decreased flux lag,

and i cr ased torque. ihemotor operates cooler V th no r motors of this type and is, all inall, rendered much more suitable for the intended purposes mentioned above and to be hereinafter more described.

An 7 electrical cable is extends at an elevated point thereon is connected with winding 2i to energize the. latter and operate motor iii in the usual fashion. v

. Byreierence to Figs. 1 and lgit will be seen 'that the laminated iron field 22 extends radially. outward into contact with the copper shell and maintains this contact for a substantialdisically of the shell, thereby placing the field *nnate and eifective heat con-ducting relation to the shell. This latter extends down into the supply of liquid'2 in the reservoir l, whereby. to be continuously cooled thereby and thus dissipate the generated in the operation. of the motor, which heat if not'appropriately led would soon result in burning out of the held winding.

The extent to which the shell or sheath is imtive liquid seal and suitable shaft packing for the pump peller may be employed to prevent any liquid whatsoever entering the casing or sheath.

The invention is not particularly concerned with such other alternative modifications. However, I consider it novel with me to provide an enclosed motor drive for a pump wherein the field win-ding of the motor is disposed coaxially of its shaft and the laminated plates of the iield are 3T? ranged'in planes normal to the line of the rotor axis and in direct heat conducting relation to a copper or other metallic conducting sheath immersed at least in part in the liquid to be pumped, whereby to quickly and effectively dissipate heat generated in the operation of the motor. The latter has improved operating characteristics, as discussed above, and runs at adecreasedtemperature, which is especially desirable in an installation as described.

The terms and "expressrons'which have been eluding any equivalents of the features shown and described; It is recognized that various modifications are possible within the scope of the in[ vention claimed.

Having thus described, my invention, what I claim as newand desire to secure by Letters'Patexit is:

1. In a pumping unit of the type described comprising a supporting base having a pumping chamber therein provided with a liquid inlet and a liquid outlet and adapted to be immersed at least in part in a supply of liquid to be pumped and a vertical impeller shaft rotatably mounted on said support having an impeller on its lower d'rotatable in said' chamber the combination -ol.a inc-tor for driving said shaft comprising a rotor connected to the latter, a stator having poles adjacent the rotor and a central portion extending over the upper end of the rotoraxis,

and awinding on said central portion in axially ced relation to the rotor, and a casing of heat co: ducting material closed at its top andfitting over and encircling said motor wi the casing, said casing extending belowthe normal level of liquid in said liquid supply",whereby to provide adirectconductive'patn for dissipatic-n of heat generated in the winding and coil in operation of the motor.

In. a pumping of the type described poles adjacentthe rot-or and acentral portion 7 extending over the upper end of the rotor axis, and a winding on said'central portion in axially spaced relation to the rotor, and a casing of heat conducting material fittingover and encircling said motor with the stator of the latter in direct contact with the sides or" the casing, said casing extending below the normal level'of liquidin said liquid supply whereby to provide a direct -con-' e path for dissipation of heat generated in in mg and coil in operation of the motor. 3. in pumping unit of the type described comprising a supportin base having a pumping chamber therein prov with a liquid inlet and a would outlet and adapted to be immersed at in in a supply or liquid to be pumped ipeller shaft rotatabiy mounted I having an impeller on its lower oatable in said chamber the combination tor connected to latter, a iieid adjacent the rotor, and a cosin of heat conducting metal or en cling said motor with the held or the latter in direct contact with thesides the casing sa'id casing extending belowthe normal level of li in said liquid supply whereto provide a direct conductive path for dissipation-of heat generated in the winding and coil in operation of the motor. 7 '7 r HOMER H. INGERSOLL.

n the stator of the-latter in direct-contact ththe sides of 

